CLI to open in project

Need a very simple binary that can be installed by the app similar to zed that would let the user be able to type `conflicto .` and it would both open the conflicto app and open the project in it.

If a conflicto window was already open it switches to the `argv` path and moves the previous project into the recent projects list.

Start by tracing how the app is launched and how project paths are opened; the issue names no files or tests. Implement the installable `conflicto` entry point for `conflicto .`, including reuse of an open window and moving the previous project to recent projects. Done means the command opens the app with the requested path and updates the existing-window behavior as described.

Written by the indexing model from the issue text.